Chapter 33 Flashcards
Tooth decay
The localized destruction of dental hard tissues via organic acids
Caries
Appear as radiolucent areas on the radiograph.
40-50% loss of calcium and phosphorus
required before caries is visible on a radiograph. Caries are almost always deeper than visible on the radiograph
C1
Incipient
What does C1 of the Caries depth grading system signify
Enamel caries less then 1/2 way through the enamel
C2
Moderate
What does C2 of the Caries depth grading system signify
more than 1/2 way through enamel but not to the DEJ
C3
Advanced
What does C3 of the Caries depth grading system signify
Caries of enamel and dentin at or through the DEJ into the dentin but less than 1/2 way to the pulp
C4
Severe
What does C4 of the Caries depth grading system signify
Penetrates more than 1/2 to the pulp
What are the classification of caries
Proximal or interproximal Occlusal Buccal and lingual Cemental (root) Recurrent Rampant Arrested
Proximal or interproximal caries
Between the teeth usually at or just below the contact
Proximal caries on radiographs
A radiolucent notch triangular with point toward the DEJ
Occlusal caries
Caries on the chewing surface of the teeth. Incipient and moderate are not usually seen radiographically
Occlusal caries on radiograph
Appear as radiolucent just below the enamel and above the pulp
Buccal and lingual caries
Best detected clinically. Difficult to see radiographically and almost impossible to tell if buccal or lingual
Cemental (root) caries
Develop between the enamel border and the gingiva. Bone loss and recession are necessary. Sometimes difficult to tell the difference between cervical burnout and caries
Reccurent decay
Secendary caries or caries under or around a restoration
Rampant caries
Severe, unchecked caries affecting multiple teeth
Arrested caries
Caries that are no longer active. Most often seen when the adjacent tooth is extracted and the tooth can now be brushed better
What can be mistaken for caries
Composites
Temporary crowns and porcelain jackets
Cervical burnout
Mach band effect
Cervical burnout
Optical illusion caught on the radiograph caused by a concavity on the root that shows a RL void
Often appears as fuzzy outline
Always more apical than inter proximal caries
Look for bone loss
Mach band effect
An optical illusion caused when the teeth overlap on the radiograph and this causes a dense radiopacity surrounded by RL lines
